2. “The Father of Genetics”
Gregor Mendel
“The Father of Genetics”

3. Gregor Mendel studied pea plant phenotypes
Gregor Mendel’s Peas
Gregor Mendel studied pea plant phenotypes

4. Gregor Mendel’s Peas
Mendel cross pollinated his pea plants and observed the “offspring”

5. Codominance
Codominant alleles express the phenotypes associated with both alleles in a heterozygote. PP PW WW

6. Blood Types Before the 1900s, blood transfusions were very risky.
The ABO blood groups were discovered in 1900 by Karl Landsteiner.

7. Blood type is an inherited trait.
Blood Types
Before the 1900s, blood transfusions were very risky.
The ABO blood groups were discovered in 1900 by Karl Landsteiner.
Four blood types:
A, B, AB, and O
Blood type is an inherited trait.

8. Blood types are named for molecules (antigens) on red blood cells.
Type A
Type B
Type AB
Type O

9. Blood types are named for molecules (antigens) on red blood cells.
Blood types are an example of codominance.
Type A
Type B
Type AB
Type O

10. Alleles for blood type:
IA, IB, i

11. Blood Type Punnett Square
A Punnett square for the offspring produced by a type “O” father and an a Type “AB” mother

12. Blood Type Punnett Square
A Punnett square for the offspring produced by a type “O” father and an a Type “AB” mother. i i
IAi
IBi IA IB

13. Type A
Type B
Type AB
Type O

14. Type A
Type B
Type AB
Type O

15. We produce antibodies against antigens that we do not have.
Type A
Type B
Type AB
Type O

16. Blood Type Lab
Objective: Use your knowledge of blood types and genetics to determine if babies in a hospital were switched at birth.

17. Rhesus (D) Factor

18. Rhesus (D) Factor
A person can have D antigens on their blood cells (and be positive) or no D antigens (and be negative).

19. Rhesus (D) Factor
A person can have D antigens on their blood cells (and be positive) or no D antigens (and be negative).

20. Rhesus (D) Factor
A person can have D antigens on their blood cells (and be positive) or no D antigens (and be negative).
Alleles for Rhesus (D) Factor: + and -
+ is dominant, - is recessive

21. Blood Type Punnett
Mom: AB+
Dad: AA-

22. Blood Type Punnett
Mom: AB+
iA, iB
+, +
Dad: AA-
iA, iA
-, -

23. Blood Type Punnett Mom: AB+ iA, iB +, + Dad: AA- iA, iA -, - iA,+ iA,+

24. Blood Type Punnett Mom: AB+ iA, iB +, + Dad: AA- iA, iA -, - iA,+ iA,++-
iAiA +-
iBiA +-
iBiA +-
iA,-
iAiA +-
iAiA +-
iBiA +-
iBiA +-
iA,-
iAiA +-
iAiA +-
iBiA +-
iBiA +-
iA,-
iAiA +-
iAiA +-
iBiA +-
iBiA +-
iA,-